1 /*
2  * Copyright (C) 2015 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package com.android.settings;
18 
19 import android.app.Activity;
20 import android.content.ActivityNotFoundException;
21 import android.content.Intent;
22 import android.content.res.Resources;
23 import android.net.Uri;
24 import android.os.Bundle;
25 import android.util.Log;
26 import android.widget.Toast;
27 
28 import java.io.File;
29 
30 /**
31  * The "dialog" that shows from "Manual" in the Settings app.
32  */
33 public class ManualDisplayActivity extends Activity {
34     private static final String TAG = "SettingsManualActivity";
35 
36     private static final String MANUAL_PATH = "/system/etc/MANUAL.html.gz";
37 
38     @Override
onCreate(Bundle savedInstanceState)39     protected void onCreate(Bundle savedInstanceState) {
40         super.onCreate(savedInstanceState);
41         Resources resources = getResources();
42 
43         if (!resources.getBoolean(R.bool.config_show_manual)) {
44             finish();   // No manual to display for this device
45         }
46 
47         final File file = new File(MANUAL_PATH);
48         if (!file.exists() || file.length() == 0) {
49             Log.e(TAG, "Manual file " + MANUAL_PATH + " does not exist");
50             showErrorAndFinish();
51             return;
52         }
53 
54         final Intent intent = new Intent(Intent.ACTION_VIEW);
55         intent.setDataAndType(Uri.fromFile(file), "text/html");
56 
57         intent.putExtra(Intent.EXTRA_TITLE, getString(R.string.settings_manual_activity_title));
58         intent.addCategory(Intent.CATEGORY_DEFAULT);
59         intent.setPackage("com.android.htmlviewer");
60 
61         try {
62             startActivity(intent);
63             finish();
64         } catch (ActivityNotFoundException e) {
65             Log.e(TAG, "Failed to find viewer", e);
66             showErrorAndFinish();
67         }
68     }
69 
showErrorAndFinish()70     private void showErrorAndFinish() {
71         Toast.makeText(this, R.string.settings_manual_activity_unavailable, Toast.LENGTH_LONG)
72                 .show();
73         finish();
74     }
75 }
76